Union, IA has a population of 487 and is the 19,695th largest city in the United States. The population density is 886 per sq mi which is 1522% higher than the Iowa average and 878% higher than the national average. The median age in Union is 46 which is approximately 20% higher than the Iowa average of 38. In Union, 61% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 84% of Union residents were born in Iowa, 13% were born out of state, 0% were born outside of the United States and 3% were foreign born.
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The population density in Union is 1522% higher than Iowa.
The median age in Union is 20% higher than Iowa.
In Union 89.73% of the population is White.
In Union 0.00% of the population is Black or African American.